TOPS-20 PASCAL Language Manual - Bitsavers

More documents

Recommendations

Info

USING PASCAL ON TOPS-20 If you omit the file specification, the object file defaults to the name of the last source file, the default directory, and a file type of REL. You cannot specify this switch in the source code. You can disable this switch to suppress object code, for example, when you want to test only the source program for compilation errors. The default is /BINARY. /CHECK The /CHECK switch directs the compiler to generate co~e to perform run-time checks. This code checks for ilJegal assignments to sets and subranges, out-of-range array indices and case labels, and references to NIL pointers. The system issues an error message and terminates execution if any of these conditions occur. When this switch is disabled, the compiler does not generate code run-time checks. The default is /CHECK. for /CROSS-REFERENCE or /CREF The /CROSS-REFERENCE switch produces a cross-reference listing of all identifiers. The compiler generates separate cross-references for each procedure and function. To get complete cross-reference listings for a program, the switch must be in effect for all modules of the program. This switch is ignored if no listing file is being generated. The default is /NOCROSS-REFERENCE. You can specify this switch in the source code. Note, however, that the cross-reference listing for a portion of a procedure or function may be incomplete. /DEBUG The /DEBUG switch specifies that the compiler is to information that can be used with run-time debugging. generate The default is /NODEBUG. /ERROR-LIMIT:n The /ERROR-LIMIT switch terminates compilation after the specified number of errors, excluding warning-level errors, have been detected. The default limit is 30 errors. If this switch is disabled, compilation continues through the entire unit. You cannot specify this switch in the source code. The default is /ERROR-LIMIT:30. Note that, after finding 20 errors (including warning messages) on any one source line, the compiler generates error 255, Too Many Errors On This Source Line. Compilation of the line continues, but no further error messages are printed for that line. /FLAG-NON-STANDARD The /FLAG-NON-STANDARD switch tells the compiler warning-level messages at each place where the nonstandard PASCAL features. to program print uses 8-8
USING PASCAL ON TOPS-20 Nonstandard PASCAL features are the extensions to the proposed ISO standard for the PASCAL language that are incorporated in PASCAL-20. Nonstandard features include VALUE declarations and the exponentiation operator. Appendix D lists all the extensions. By default, /FLAG-NON-STANDARD is enabled. /LISTING The /LISTING switch produces a source listing file. It has the form: /LISTING [:fiJespecE You can include a file specification for the listing file. The default file specification designates the name of the first source file, your default directory, and a file type of LST. The compiler does not produce a Jisting file in interactive mode unless you specify the /LISTING switch. In batch mode, the compiler produces a listing file by default. In either case, the listing file is not automatically printed. /MACHINE-CODE The /MACHINE-CODE switch places in the listing file a of the object code generated by the compiler. representation The compiler ignores this switch if the /LISTING switch is not enabled. The default is /NOMACHINE-CODE. /NATIONAL The /NATIONAL switch causes the braces to have no speciaJ meaning. Therefore, if you specify the /NATIONAL switch, you cannot use braces as comment characters. Instead, you must use (* *). The default is /NONATIONAL. jWARNINGS The /WARNINGS switch directs the compiler to generate diagnostic messages in response to warning-level errors. By default, /WARNINGS is enabled. A warning diagnostic message indicates that the compiler has detected acceptable but unorthodox syntax, or has performed some corrective action. In either case, unexpected results may occur. To suppress warning diagnostic messages, disable this switch. Note that messages generated when the /STANDARD switch is enabled appear even if /WARNINGS is disabled. 8.4.4 Specifying Switches in the Source Code You can use switches in the source code to enable and disable special processing during compilation. When specified in the source code, switches have the form: (*$switch + ,switch + , ••• ;comment *) 8-9
Page 1 and 2:
TOPS-20 PASCAL Language Manual AA-L
Page 3 and 4:
CONTENTS PREFACE CHAPTER 1 INTRODUC
Page 5 and 6:
7 • 1 . 1 7 . 1 . 2 7 • 1 . 3 7
Page 7:
G-l G-2 G-3 G-4 Status of Stack Aft
Page 10 and 11:
• Appendix A lists the various me
Page 13 and 14:
CHAPTER I INTRODUCTION PASCAL-20 is
Page 15 and 16:
PROGRAM Calculator (INPUT, OUTPUT);
Page 17 and 18:
INTRODUCTION 1.1.6 Compilation Unit
Page 19 and 20:
INTRODUCTION 1.2.3 Identifiers PASC
Page 21 and 22:
INTRODUCTION The semicolon and the
Page 23 and 24:
INTRODUCTION In the following examp
Page 25 and 26:
CHAPTER 2 PASCAL DATA TYPES This ch
Page 27 and 28:
PASCAL DATA TYPES In addition to de
Page 29 and 30:
PASCAL DATA TYPES You can use strin
Page 31 and 32:
PASCAL DATA TYPES The base type can
Page 33 and 34:
PASCAL DATA TYPES is BOOLEAN, then
Page 35 and 36:
PASCAL DATA TYPES In the three-dime
Page 37 and 38:
PASCAL DATA TYPES To assign values
Page 39 and 40:
PASCAL DATA TYPES 2.3.1.5 Array Exa
Page 41 and 42:
PASCAL DATA TYPES The fields in thi
Page 43 and 44:
PASCAL DATA TYPES 2.3.2.2 Assigning
Page 45 and 46:
PASCAL DATA TYPES For example, assu
Page 47 and 48:
PASCAL DATA TYPES Sets are compatib
Page 49 and 50:
PASCAL DATA TYPES Example 3 F I 1..
Page 51 and 52:
PASCAL DATA TYPES Pointer type defi
Page 53:
PASCAL DATA TYPES Example 2 VAR Cit
Page 56 and 57:
EXPRESSIONS Table 3-1: Arithmetic O
Page 58 and 59:
EXPRESSIONS TabJe 1-2: Result Types
Page 60 and 61:
EXPRESSIONS The set operators (+, *
Page 62 and 63:
EXPRESSIONS PROGRAM Level_.O (IN PU
Page 65 and 66:
CHAPTEH 4 PROGRAM HEADING AND DECLA
Page 67 and 68:
PROGRAM HEADING AND DECLARATION SEC
Page 69 and 70:
Page 71:
Page 74 and 75:
PASCAL STATEMENTS Simple and compou
Page 76 and 77:
PASCAL STATEMENTS Example q Ase~5 :
Page 78 and 79:
PASCAL STATEMENTS The objects of th
Page 80 and 81:
PASCAL STATEMENTS Example 1 CASE EN
Page 82 and 83:
PASCAL STATE~ENTS Example 4 := 1 TO
Page 84 and 85:
PASC~L STATEMENTS 5.5 THE WITH STAT
Page 86 and 87:
PASCAL STATEMENTS Example FOR I :=
Page 89 and 90:
CHAPTER ~ PROCEDURES AND FUNCTIONS
Page 91 and 92:
PROCEDURES AND FUNCTIONS Table ~-l:
Page 93 and 94:
PROCEDURES AND FUNCTIONS Table ~-1:
Page 95 and 96:
PROCEDURES AND FUNCTIONS This progr
Page 97 and 98:
PROCEDURES AND FUNCTIONS You can al
Page 99 and 100:
PROCEDURES AND FUNCTIONS This progr
Page 101 and 102:
PROCEDURES AND FUNCTIONS Boolean fu
Page 103 and 104:
Page 105 and 106:
PROCEDURES AND FUNCTIONS Table h-3:
Page 107 and 108:
Page 109 and 110:
PROCEDURES AND FUNCTIONS Data items
Page 111 and 112:
PROCEDURES AND FUNCTIONS The actual
Page 113 and 114: PROCEDURES AND FUNCTIONS An optiona
Page 115 and 116: PROCEDURES AND FUNCTIONS Example 1
Page 117 and 118: PROCEDURES AND FUNCTIONS Fo rma t 1
Page 119 and 120: PROCEDURES AND FUNCTIONS As a resul
Page 121 and 122: PROCEDURES AND FUNCTIONS label sect
Page 123 and 124: PROCEDURES AND FUNCTIONS The functi
Page 125 and 126: PROCEDURES AND FUNrTIONS Example 1
Page 127 and 128: CHAPTER 7 INPUT AND OUTPUT This cha
Page 129 and 130: INPUT AND OUTPUT In executing this
Page 131 and 132: INPUT AND OUTPUT where: file variab
Page 133 and 134: INPUT AND OUTPUT When you reach the
Page 135 and 136: INPUT AND OUTPUT To specify only th
Page 137 and 138: INPUT AND OUTPUT 7.7.4 Record Type
Page 139 and 140: INPUT AND OUTPUT This example cause
Page 141 and 142: INPUT AND OUTPUT 7.9 THE PUT PROCED
Page 143 and 144: INPUT AND OUTPUT READ does not read
Page 145 and 146: INPUT AND OUTPUT This program fragm
Page 147 and 148: INPUT AND OUTPUT You must call REWR
Page 149 and 150: INPUT AND OUTPUT The following rule
Page 151 and 152: INPUT AND OUTPUT This example write
Page 153 and 154: INPUT l\ND OUTPUT Example 1 BEGIN W
Page 155: INPUT AND OUTPUT The first referenc
Page 158 and 159: USING PASCAL ON TOPS-20 8.2 FILE SP
Page 160 and 161: USING PASCAL ON TOPS-20 After plann
Page 162 and 163: USING P~SCAL ON TOPS-20 /TAKE The /
Page 166 and 167: USING PASCAL ON TOPS-20 The first c
Page 168 and 169: • AVERAGE SCORE SOURCE LISTING o
Page 170 and 171: USING PASCAL ON TOPS-20 The compile
Page 172 and 173: USING PASCAL ON TOPS-20 8.4.6.3 Cro
Page 174 and 175: USTNG PASCAL ON TOPS-20 Example 3 f
Page 176 and 177: PASDDT: THE PASCAL-20 DEBUGGER 9.3
Page 178 and 179: PASDDT: THE PASCAL-?O DEBUGGER cons
Page 180 and 181: PASDDT: THE PASCAL-20 DEBUGGER As s
Page 182 and 183: PASDDT: THE PASCAL-20 DEBUGGER Note
Page 186 and 187: PASDDT: THE PAS~AL-20 DEBUGGER ]. T
Page 190 and 191: P~SDDT: THE PASCAL-?O DEBUGGER To r
Page 193 and 194: ._------------- Table A-I: Run-time
Page 195 and 196: PASCAL MESSAGES -------------------
Page 197 and 198: PASCAL MESSAGES ? PASOl7 "BEGIN" ex
Page 199 and 200: PASCAL MESSAGES ? PASIOS Sign not a
Page 201 and 202: PASCAL MESSAGES ? PAS130 Expression
Page 203 and 204: PASCAL MESSAGES ? PAS157 Case label
Page 205 and 206: PASCAL MESSAGES ? PAS184 External p
Page 207 and 208: PASCAL MESSAGES ? PAS?II Incorrect
Page 209 and 210: PASCAL MESSAGES ? PAS253 Too many a
Page 211: PASCAL MESSAGES % PAS457 Nonstandar
Page 214 and 215:
ASCII CHARACTER SET Table 8-1: The
Page 217 and 218:
APPENDIX C SYNTAX SUMMARY This appe
Page 219 and 220:
SYNTAX Sm1MARY ::= I I I I
Page 221 and 222:
SYNTAX Sur~MARY ::= := ::= I
Page 223 and 224:
SYNTAX SU~1MARY ::= ft ::= ::=
Page 225:
SYNTAX SUr-1MARY ""= ::= ,
Page 228 and 229:
-------- ---- ---- ----------------
Page 230 and 231:
ISO COMPLIANCE 4. A program paramet
Page 232 and 233:
ISO CO~PLIANCE The DISPOSE procedur
Page 234 and 235:
ISO COMPLIANCE In the UNPACK(z,i. ,
Page 236 and 237:
ISO COMPLIANCE In a FOR statement,
Page 239 and 240:
APPENDIX F DIFFERENCES BETWEEN PASC
Page 241 and 242:
DIFFERENCES BETWEEN PASCAL-20 AND V
Page 243 and 244:
APPENDIX G PROCEDURE AND FUNCTION C
Page 245 and 246:
PROCEDURE AND FUNCTION CALLING SEQU
Page 247 and 248:
PROCEDURE ~ND FUNCTION CALLING SEQU
Page 249 and 250:
INDEX /ABORT switch, 8-7 ABS functi
Page 251 and 252:
Function (Cont.) EOF, 1-7, 6-14 EOL
Page 253:
INDEX (Co n t. ) Set operator, 1-8,
Page 256:
- Do Not Tear - Fold Here and Tape
show all

TOPS-20 PASCAL Language Manual - Bitsavers

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?